This is a note to let you know that I've just added the patch titled

x86/pti: Mark constant arrays as __initconst

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: x86pti_Mark_constant_arrays_as___initconst.patch and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

Subject: x86/pti: Mark constant arrays as __initconst From: Arnd Bergmann arnd@arndb.de Date: Fri Feb 2 22:39:23 2018 +0100

From: Arnd Bergmann arnd@arndb.de

commit 4bf5d56d429cbc96c23d809a08f63cd29e1a702e

I'm seeing build failures from the two newly introduced arrays that are marked 'const' and '__initdata', which are mutually exclusive:

arch/x86/kernel/cpu/common.c:882:43: error: 'cpu_no_speculation' causes a section type conflict with 'e820_table_firmware_init' arch/x86/kernel/cpu/common.c:895:43: error: 'cpu_no_meltdown' causes a section type conflict with 'e820_table_firmware_init'

The correct annotation is __initconst.

Fixes: fec9434a12f3 ("x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown") Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: Ricardo Neri ricardo.neri-calderon@linux.intel.com Cc: Andy Lutomirski luto@kernel.org Cc: Borislav Petkov bp@suse.de Cc: Thomas Garnier thgarnie@google.com Cc: David Woodhouse dwmw@amazon.co.uk Link: https://lkml.kernel.org/r/20180202213959.611210-1-arnd@arndb.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/kernel/cpu/common.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -876,7 +876,7 @@ static void identify_cpu_without_cpuid(s #endif }

-static const __initdata struct x86_cpu_id cpu_no_speculation[] = { +static const __initconst struct x86_cpu_id cpu_no_speculation[] = { { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_CEDARVIEW, X86_FEATURE_ANY }, { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_CLOVERVIEW, X86_FEATURE_ANY }, { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_LINCROFT, X86_FEATURE_ANY }, @@ -889,7 +889,7 @@ static const __initdata struct x86_cpu_i {} };

-static const __initdata struct x86_cpu_id cpu_no_meltdown[] = { +static const __initconst struct x86_cpu_id cpu_no_meltdown[] = { { X86_VENDOR_AMD }, {} };

Patches currently in stable-queue which might be from arnd@arndb.de are

queue-4.14/x86pti_Mark_constant_arrays_as___initconst.patch queue-4.14/auxdisplay-img-ascii-lcd-add-missing-module_description-author-license.patch